Summary: I installed these bad boys in my front and rear doors in my Cadillac. They sound great for a 5.25" speaker and it's a definite upgrade from the paper coned factory speakers. Really crisp highs and decent mids. The mid frequencies aren't great but they're not terrible either. The mids range somewhere a little bit above average.
Conclusion: I bought these to replace the stock front speakers in a 1999 Monte Carlo. To be honest the stock speakers were pretty good as they were 2 way speakers with a decent power handling so i was a little worried. After getting these ones out of the box i noticed there was a huge difference in the voice coil size and in the size of the magnet. Right after putting in these speakers i was impressed with the highs but the low end wasn't what i thought it would be.
Conclusion: I recomend these speakers because they perform for the price, plain and simple they sounded great with just my Kenwood KDC-HD545U and sound even better with just 75 clean watts going to each from my Mid and hi amp.